Saw-jointing device



(NoMoael.)

J. W. EDMONSON.

SAW JOINTING DEVICE. No. 352,050. Patented Nov. 2, 1886.

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`UN1TED STATES y*Pmfmr f OFFICE.

JAMES WALKER nDMo'NsoN, on MENDON, oHIo.

SAW-JOINTING DEVICE. I

SPECIFICATION forming'part of Letters Patent No. 352,050, dated November 1886.

.Application filed Maren ai, isses.

Serial No. 197,326. (No model.)

To a/ZZ whom it may concern: y,

Be it known that I, JAMES WALKER EDMON- soN, a citizen of the United States, residing at Mendon, in the county of Mercer and State of Ohio, have invented a new and useful Improvement in Saw-Jointing Machines, of `which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in saw-jointing devices, and has for its object the provision of an implement of the class named y adapted to be quickly set to suit saws of -different diameters, for the purpose of trning or sharpening the teeth thereof, and in the means employed to e'ect this purpose, substantially as hereinafter described, and specifically pointed out in the claims.

In the drawings, Figure 1 represents a side elevation of a saw-jointing device embodying my improvements'and'inposition upon a circular saw. Fig. 2 is a front view thereof. Fig. 3 represents a transverse sectional view on the line x x of Fig. l. Fig. 4 is a similar -transverse sectional view taken on the line y y of Fig. 1S Fig. 5 represents a vertical longitudinal section on the line .e z of Fig. 2.

Referring to the drawings, in which similar letters of reference denote similar parts, A

designates the body of the device, preferably formed of wood, and in oblong form both as regards its length and area of cross-section. The lower end of the body A is hollowed out to suit different-sized mandrels of saws, as shown at ce.

A designates a portion of the upper part of the bodyA, said part or portion of less width and thickness than the remaining part of the body, and having its rear surfacey flush with the rear surface of said remaining part of the body, which part, for convenience of descri ption, will be hereinafter designated by the letter A2. rlhe front surfaceV of the part A' is provided with a groove, a', in which is secured by screws a a strengthening plate or bar, a3, that extends from end to end of the groove.

B designates a plate secured to the top of the part A', the ends b of which .project outwardly from the sides ofsaid part A' for a short distance, and are provided with apertures that receive the upper ends of rods C, that extend thence to the upper end of the part A2, and are secured to said part by screws that lower ends of the rods C, as shown. yThe upper ends ofthe rods C are screw threaded and held in position in the apertures by nuts. D designates plates secured by screws to the side edges of the part A', to further strengthen said part. y

E designates a cross-head having an aperi ture, e, rectangular in shape,fto fit loosely. the sides and edges of the part A', and apertures e' at each end of said aperture e, through which the rods C pass when'the cross-headis in proper position upon the part A'.

e2 designates a plate that is held by screws ea within a recess formed in the upper surface of the cross-head E.

pass through apertures formed in the flattened e5 designates a screw-threaded rod that eX- l tends through a lug or ear, bz, formed upon the forward side edge of the plate B, ina plane parallel with the surface and side edges of the part A', to a plate, e, secured upon the upper forward edge of the part A2 in front of the part A', the end of said rod havinga shoulder that rests upon the upper surface of said plate e, a nick that passes through an aperture formed in said plate, and a swelled head that bears against its lower surface, whereby the rod is lheld in proper position and prevented from drawing out of said plate. This rod e5 passes through a screw-threaded aperture formed in the plate e2 of the cross-head E, and l operates when rotated`by a hand-wheel, e7, secured upon the upper end of the rod e5, to move said cross-head up or down upon the part A' and rods C.

F designates an ordinary iile that is held in agroove, f, formed in the lower surface of the crosshead E inra plane parallel with its front edge. f designates a saw-slit that extends from one end of the cross-head backward or inward to a point, fl. This slit is parallel with the front edge of the cross-head, and opens at its bottom into thegroove f upon thelower surface of said cross-head.

g g' designate headed bolts that pass through the cross-head near its ends from side edge to side edge thereof, and are provided upon the forward edge of said cross-head with burrs or nuts f 3. One of said bolts, g', operates to close IOO the slit f', and thus to pinch or jam the sides The operation of (ffy improvement is as'ollows: The lower end, a, of the body A is placed upon the mandrel, upon which a saw is mounted, at the side of said saw. The crosshead E is now moved outward by the rod e until the tile F touches the outer edge of the teeth on said saw. The device is now moved around said saw, the le F operating to true the ends of the teeth, and at the same time to sharpen said ends. That the cross-head may remain in accurate position upon the'rods C-that is to say, may, after the device has been in use for considerable time, continue to move freely and accurately upon the rods C, with lateral play thereon-I provide said cross-head in the apertures e', formed therein, and through which the rods C pass, with bushings or thimbles e4, that closely it said rods.

If desired,a bracket, H, may be secured upon the rear surface of the part A', and provided with a handle, H', for the purpose of aiding in the manipulation of the instrument.

Modifications in detail of construction may be made in my improvement without departing from the spirit or sacrificing the advantages thereof.

I claim- 1. In a saw-jointing machine, the combination of the body A, the sliding cross-head E thereon, the said cross-head havingthegroove f on one side to receive the file, and the slitf and clamping-bolt g, to secure the ile firmly in the said groove, substantially as described.

2. In a saw-jointing device, a body, A, consisting of the parts A A2, the former of which is of less width and thickness than the latter, and provided with plate B, having projecting portions b b2, rods G, that extend at the side edges of said part A, and plate e", in combination with a cross-head, E, having a plate, e2, provided with a screw-threaded aperture,

and a screw-threaded rod, e5, to. 'adjust said cross-head, substantially as described.

3. In a saw-jointing device, a body, A, having a part, A1, and a part, A', the former of 45 greater width and thickness than the latter, a plate, B, secured at the upper end ofthe part A', rods G, extending at each side of said part A, and secured at their ends to the part A2 and plate B, plates a and D, secured to the part u lcombination with a body,-A, rods C, and

screw-threaded adjusting-rod c, substantially as described.

5. In a saW-jointing machine, a body, A, having the parts A A2 of different widths and thickness, the former having a grooved front surface and strengthening-plates a and D, and plate B, having projections b b2, in combination with a cross-head, E, having a iile, F, secured thereto, and file-securing slit f/ and bolt g', adjusting-rod e", having hand-wheel at its top, and guide-rods C, substantially as described.l

In testimony that I claim the foregoing as my own I have hereto affixed my signatur-ein presence of two witnesses.

JAMES VALKER EDMONSON.

Vitnesses:

A. C. PREsHo, F. M. PREsHo. 

